Crushing-roll.



(No Model.)

- E. w. M cCANNA. cnusnms ROLL.

(Application filed May 11, 1900.)

Patented Nov. l3, I900.

1N VEN TOR.

' ATTORNEY.

Unrrnn STATES PATENT OFFICE.

EDWARD W. MOOANNA, OFANACONDA, MONTANA.

CRUSHlNG-ROLL.

SPECIFICATION forming part of Letters Patent No. 661,617, dated November 13, 1900.

Application filed M yll, 1900. .ierialNo. 16,353- lNo modal To cold whom, it may concern:

Be it known that l, EDWARD W. MOCANNA, a citizen of the United States, residing at Ana.- conda, in the county of Deer Lodge and State of Montana, have invented a certain new and useful Improvement in Orushing- Rolls, of which the following is a full, clear, and exact descriptionv This invention relates to a roll for use in machines for crushing or grinding all kinds of rock and ore; and the object of my invention is to render it unnecessary when renewing or replacing the roll-shells or active surfaces of the roll to take the machine apart and lift the shaft and roll out of the bearings.

In all machines employing rolls for crushing or grinding the shells wear out and it becomes necessary to replace the worn-out ones with new shells frequently, and as the ma chines are now constructed it requires considerable time and labor to do this, as the roll and shaft must be lifted out of the bearings, the worn-out shell broken or forced off the core, the new shell fastened on, and'the shaft and roll then replaced in the bearings.

In my invention the shell is made in sections, which are held in place on the core by means of clamp-plates bolted to the core, so that the sections can be removed and others substituted without taking the machine apart or lifting the shaft and roll from the bearings, thus saving considerable time and labor.

In the accompanying drawings, illustrating my invention, in both views of which like parts are similarly indicated, Figure l is a front view of the sectional shell and core as the roll appears when ready for use. Fig. 2 is a vertical cross-section of the same, showing the manner in which the shell or sections of the same are held firmly in place on the core.

. A A are the shell-sections, each of which is made with a dovetailed rib on the inner side adapted to be fitted into a groove in the core.

B B are clamp-plates fitting on one side of the core and at one end forming one side of the groove into which the dovetailed rib on the shell fits and at the other and inner end beveled, for a purpose presently appearing.

O is the core, peripherally grooved su bstantially as shown to eceive the ribs of the shellsections and recessed on one face to receive the clampplates, said recesses being complemental in shape to the adjacent surfaces of the clamp-plates.

D D are bolts which fasten the clamp-plates to the core, thus holding the shell-sections in place.

The core 0 has a hole E, through which the shaft. passes, and a keyway F for holding the same in place on the shaft.

It will be observed that the clamp-plates B are applied to one face only of the core and that the core itself is utilized as a complemental fastening and support for the shellsections A.

As shown, the c1ampplates B, in addition to the beveled connection with the shell-sections and core, may have projections at top and bottom to enter corresponding grooves in the shell sections and core-recess, respectively, in order the more securely to retain the parts in position. It will also be observed that the bolts D extend entirely through the core and that the core and clamp-plates are provided with recesses or countersinks to receive the heads of the bolts and the nuts. It will be observed also that the clamp-plates are equal in number to the number of shellsections and that their radial lines of division are coincident with the radial lines of division between the shell-sections.

By the construction described of independent clamp-plates and independent shell-sections any of the shell-sections may be removed and replaced without disturbing the others and eachand all of the shell-sections maybe removed and replaced without dismounting the roll from the machine.

The roll may be made up of as many sections and of any size desired.

What I claim is- 1. Aroll,forgrindingorcrushing machines, having a core grooved on its periphery and recessed on one face, and a shell comprising a series of sections each provided with a dovetailed rib to engage the groove in the core, and a com ple mental series of clamp-plates for said shell-sections constructed to fit the recessed face of the core and to engage the ribs of the shell-sections, and bolted to the core, substantially as described.

2. A roll, for grinding or crushing roll machines, having a dovetailed groove in its pcriphery and a recessed face combined With a section and plate in place and permitting the I0 series of shell-sections having dovetailed ribs independent removal and renewal of the shellto engage the dovetailed groove, and a comsections, substantially as described.

plemental series of clamp-plates for said shell- In testimony whereof I have hereunto set sections constructed to engage the dovetailed my hand this 5th day of May, A. D. 1900.

ribs of the shell-sections and also to engage 'EDWVARD WV. MCOANNA.

the recess in the core, and bolts passed Witnesses: 4 through the core and the clamp-plates and B. F. MAIDEN, thereby independently securing each shell- W. C. MADGE. 

